After Zalaris Norseman Xtreme Triathlon, the finish line isn’t the end for science. For researcher Martin and the Norseman Research Team, it’s the beginning. By analyzing the blood biomarkers of athletes before and after the race, they’re uncovering how the body reacts—and recovers—from one of the most extreme endurance tests on the planet.

Eric McElvenny and Zach Collett are no strangers to adversity. As combat veterans and paratriathletes, they’ve fought battles far beyond the finish line.

Now, as part of Team Stout and USAT Foundation, they’re taking on the Zalaris Norseman Xtreme Triathlon — not just to test their limits, but to inspire athletes and veterans to reclaim purpose through struggle, camaraderie, and relentless pursuit of excellence.

Every year, 250 athletes arrive in Eidfjord ready to take on Zalaris Norseman Xtreme Triathlon— but not all their bikes are equally prepared. Marius from Velocity Sport has been the event’s go-to mechanic since 2015, keeping riders rolling with expert advice, quick fixes, and crucial pre-race checkups. In this interview, he shares the most common gear mistakes, how to avoid them, and what every athlete should do before hitting the start line.